应用题When a toy rocket is shot into the air,the height is h=-0.332t^2 + 3.32t where h is the height in metres and t is the time in seconds.a)At what time(s) is the rocket at a height of 3 metres?(Answer correct to the nearest tenth)b) For how lon

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应用题When a toy rocket is shot into the air,the height is h=-0.332t^2 + 3.32t where h is the height in metres and t is the time in seconds.a)At what time(s) is the rocket at a height of 3 metres?(Answer correct to the nearest tenth)b) For how lon
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应用题When a toy rocket is shot into the air,the height is h=-0.332t^2 + 3.32t where h is the height in metres and t is the time in seconds.a)At what time(s) is the rocket at a height of 3 metres?(Answer correct to the nearest tenth)b) For how lon
应用题
When a toy rocket is shot into the air,the height is h=-0.332t^2 + 3.32t where h is the height in metres and t is the time in seconds.
a)At what time(s) is the rocket at a height of 3 metres?(Answer correct to the nearest tenth)
b) For how long is the rocket at a hegiht of 3 metres or higher?
请演算这道题,请写出过程,
oh forgot to mention to please use the quadratic formula to solve.
Quadratic Formula:x=-(b)+/- square root of b^2-4(a)(c)
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2(a)

应用题When a toy rocket is shot into the air,the height is h=-0.332t^2 + 3.32t where h is the height in metres and t is the time in seconds.a)At what time(s) is the rocket at a height of 3 metres?(Answer correct to the nearest tenth)b) For how lon
from the questions know when h=3m
then -0.332t^2 + 3.32t =3(up)or h(max)-gt^2/2=3(down) g=9.8m/s^2
h(max)=8.3m（when t=5s)
so t=1.0045s or t=5+1.0252=6.0252s
At this time(s) the rocket at a height of 3 metres.
b)from a) know the answer
For 1.0045s or 6.0252s the rocket at a hegiht of 3 metres or higher.
Are you ok?No,then can find me.

解两个方程:-0.332t^2+3.32t=3和-0.332t^2+3.32t>=3,数学题都用英语出,我知道你会解

from the questions know when h=3m
then -0.332t^2 + 3.32t =3(up)or h(max)-gt^2/2=3(down) g=9.8m/s^2
h(max)=8.3m（when t=5s)
so t=1.0045s or t=5+1.0252=6.0252s
At this time(s) the rocket at a height of 3 metres.
b)from a) know the answer
For 1.0045s or 6.0252s the rocket at a hegiht of 3 metres or higher.

1.h=-0.332t^2+3.32t=3
so t=1.005s
第二问没读懂是什么意思

应用题When a toy rocket is shot into the air,the height is h=-0.332t^2 + 3.32t where h is the height in metres and t is the time in seconds.a)At what time(s) is the rocket at a height of 3 metres?(Answer correct to the nearest tenth)b) For how lon My classmate needs a new toy rocket.改为一般疑问句 a rocket是什么意思 i just a toy when you are lonely 急 Rocket rocket a toy how can a rocket fly? 有没有take a rocket when 后加主语是跟动词ing还是动词原形please close the door and windows when _____the office.A.leaving B.leaveWhen the gas ___very hot inside the rocket,it wil run out of the end of the rocket ,so it can make the rocket fly up into the sk What toy dia you like best when you were a samll child why? A rocket can fly in the the book ()the computer was written by bill gatesA about B for c sitting D sits when is the best time ()plant vegetableA on B in C for D to同义句转换This year i joiner a rocket club I ( )a ( )of the rocket club this yearshall we make a rocket( ) in a toy shop “stand outside a toy play with a toy Will you please buy me a toy when you go () the toy shop A pass B past C passes D pas为什么选 某个 请说明理由 坐火箭是take a rocket还是 fly a rocket?请高手作说明.